The most common and most likely answer to this crossword clue is the 6 letter word AEDILE
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The straight part
We know that "Roman official" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case roman official = aedile.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does AEDILE mean?
AEDILE noun- An elected official who was responsible for the maintenance of public buildings, regulation of festivals, supervision of markets and the supply of grain and water.